US1223438A - Combined forming and cut-off tool. - Google Patents

Description

' C. M. SPENCER.

COMBINED FORMING AND CUT-OFF TOOL,

v APPLICATION FILED SEPT-'13. I916.

merited Apr. 24,1917.

I y I hvenfur ,5 Affarne UNITED STATES PATENT OFFICE.

' I. OI HARL'IPIOBID, CONIIECTICU'I', ASSIGNOB TO THE BBI'IAHIACHINI COMPANY, 01' NEW BBI'IAIN, CONNECTICUT, A COBPO BA'IION or common.

001mm ronume m cur-on 'roo'L.

' Specification of Letters remit. A Patented Apr. 24, 1917.

Application filed September 18, 1916. Serial No. 119,885.

To all whom it may concern:

Be it known that I I, Cmus'rornnn siding at Hartford in the county of IIartford and State of (lonnecticut, have invented certain new and useful Improvements in Combined Forming and Gut-Off Tools, of which the followin is a specification.

This invention re ates to a combined forming and cut off tool, the object being to provide an article of this character which is effective and accurate in action. The tool may be advantageously-mounted in or em ployed in conjunction with metal-working and other machines of various kinds, one

illustration being wherein the stock is in the form of a length or bar which is generally rotated during the forming and cuttin oif operations and at the conclusionof w ich the stock is released and then advanced for a repetition of such operations, The formin portion of the tool may be utilized in di erent -wa s, it being of particular utility, however, w en employed for chamfermg. This is but one example of several.

In the drawings accompanying and forming part of' the present specification I have shown in detail one convenient form of embodiment of the invention which will be set forth fully in the following description. As may be inferred I do not restrict myself to this disclosure; I maydepart therefrom in several res ects within the scope of the invention de description.

Referring to said drawmgs:,

Figure 1 is a side elevation and Fig. 2 a transverse section on the line 2-2 of Fig. 1, lookin the direction of the arrow, of a metal-wor ng machine equipped with a tool embodying the invention.

Fig. 3 is a face view of the tool.

Fi 4 is a bottom plan view of the same showing by dotted lines a head and the work.

Fig. 5 is a viewof the tool as seen from the left in Fig. 3. n I

Fig. 6 is a practically similar new of the cutting portion merely of the tool.

Like characters refer to like parts throughout the several views which are on different scales; for instance Fig. 6 is on a larger scale than Figs. 3 to 5 inclusive, while the scale ed by the claims following said,

of Figs. 1 and-2 is very much smaller than M. that of said Figs. 3 to 5. SPENCER, a citizen of the United States re- As I have practically already observed, while the tool is of general use, it is of especial facility when mounted in a metalworking machine. shown parts of such a machine comprising the base or bed 2. .Fastened as by bolts to the base or bed 2 is a bracket as 3, constituting i, suitable support for a work-carrier as 4. he work-carrier is represented as con-. sisting of a cylindrical member bored for the reception of a spindle 5 which is rotated inany way common in the art and which is provided at its front end with a collet which is closed and opened as occasion re-' quires. In the present case the work rotates, although this might not always be necessary. During its rotation it is subjected to the action of the compound tool, a piece of stock forming an article or a blank for-an article being cut off at the conclusion of such action. At this point the collet is openedand the stock advanced to bring into the range of action of the tool a second length of stock, at which time the operation is repeated.

The carrier for the tool hereinafter more particularly described, may be of any-suitable nature, the slide 6 answering satisfactorily in this connection, having suitable means also hereinafter described to which the tool is connected. The slide in turn may be operated in any desirablemanner as by the cam 7 carried by the shaft 8 which is given intermittent rotary movements as also common in metal-working and like-func tioning machines. Supported by the bed 2 between its ends is a lever as 9 serving as a convenient means to transfer the eflect of the cam to the slide, the upper end of the lever being pivoted or otherwise suitably jointed to the slide 6 and the lower branch having a stud as 10 extending into a race 11 of the earn, the construction being such that on each intermittent rotation of the cam the slide will be given a complete reciprocation In Figs. 1 and 2 I have to impart'an advancing movement'to the a slide from its retracted position indicated in Fig. 2, the tool on the slide performing its oflices on the advance motion of the slide. When the stock is cut oil as will hereinafter appear the slide is retracted. I have deal.

scribed butbriefly certain elements of a 15 and 16 as will hereinafterappear being metal-workin mach ne. .The invention, as capable of rotary adjustment.

will beclear, Is not restricted in this particular.

As will be understood from the remarks \already made the tool comprises a forming 'portion and a cutting 0 portion. Ob-

viously the cut off portion isiforcutting a piece of stock from the remainder. The forming portion may be utilized in any desirable manner. In the present case it is adapted for chamfering, and the chamfered or otherwise-formed part cut off from the stock may be a nut, a nut blank or any other suitable article. The work which the tool is assumed to do in-the showin made is a nut or a nut blank, the stock in this par-- ticular case being hexagonal in cross section but as will be evident, the invention is not limited in this and like particulars. There is in use 'a compound tool which is adapted to effect simultaneously forming and cut ofl" functions, but the forming part of the tool concludes its ofiice before the stock is cut off, which is an objectionable factor, in that there is a protrusion or a bur left on the theoretically-finished face of the article. By my tool this thing is eliminated, the result being that the finished surface of the article either in complete or blank form is smooth and clean. In the present device the forming action and the cutting action may occur and do occur contemporaneously, but the forming portion whether chamfering or otherwise, is concluded before the cut is done, the result being the high grade of work noted. I show in detail in Figs. 31:0 6 inclusive a highly-advantageous structure manded by the scope of. my claims, restrict myself to any specific disclosure.

The tool illustrated especially in these views and also appearing on a smaller scale in Figs. 1 and 2, involves in itsorganization a mounting part or member, the approximatel flat shank answering satisfactorily in this particular. This shank when the tool is used as represented in said Figs. '1.

and 2'extends transversely of the bed 2 and is sustained by adjuncts on the slide, for instance it 'can be held fixedly in a clamp such as that denoted in a general wa by 13. As'shown the inner end of this ank has a laterally offset head 14 to which .the tool members or portions are connected. There are two of such tool members or portions such'as 15 and 16, the part 15 serving as a chamfering element, while the part 16 acts to 'cut off." These two elements are practically circular in shape, the part 15 fitting flatwise against the laterally offset head 14 and being in turn countersunk as at 17 onits outer face to'receive for turning movement the part 16, both said parts which the-advantage inquestion can be, 40 accomplished, but I do not, except as de- The two parts may beassociated together and connected with the mounting or equivalent part 12 in any desirable manner, although the means shown for this purpose will now be described. The said parts 15 centrally perforated to receive and 16 are the headed stud 18 which also extends through a perforation or hole in register with the perforations or holes of said tool parts 15 or 16. The portion of the stud which extends into the opening of the head 14 is polygonal in cross section, the opening which receives said polygonal portion being correspondingly formed to prevent turning of the stud with respect to the head 14. The perforations or holes in the parts 15 ocircular to comparatively freely receive the cylindrical portion of the stud 18. The back and 16 are [end of said stud is threaded to receive the binding nut which can be operated to solidly flatwise clamp the tool parts 15 and 16 to each other and to the head 14. ,By loosening the nut either or both of the parts 15 and 16 can berotatively adjusted,

the adjustment is obtained the set to maintain the adjustment.

and when nut will be The peripheral portion of the chamfering member 15 is cut away as at 20 to produce a circumferential slot, one wall of the slot being upon a bevel as at 21, this beveled surface being intended for chamfering and having at one end a slight lip an initial out on the work.

22 to make The cutting oif portion -16 has a peripheral slot 23, one wall of which or' that de noted by 24 acting as the cutting off part of the tool. It will be noted, for instance on inspection of Fig. 3, that the cutting surface 24 is radial to the stock, while the cutting surface .21 is tangential to said stock. It will also be observed that the chamfering portion of the tool acts in advance of the cutting portion, the consequence being that the chamfering operationawill be concluded before operation.

- It will the cutting be assumed that the slide 6 is in 'its retracted position as shown in Fig. 2,

that the shank is clamped to said slide'by the clamp 3 and that the work in the spindle 5 is held against longitudinal movement but is being rotated in the direction {of the curved arrow. It willbe further supposed that the slide 6 is advanced by of the cam 7. The slide on its the rotation advance follows the direction of the straight arrow in said Fig. 2. On the advance of the slide the tip or point 25 of the chamfering part 15 will meet the outer surface of the work and as the slide 6 continues to advance the cham fering operation will be commenced and will be fimshed slightly before the slide has completed its advance movement at which point ment, however, the chamfering portion will.

have completely finished its work. Beyond this point or after. thechamfering portion hascompleted its function, the cutting olf part 16 will continue to act and will finish its out as the slide finishes its advancing movement.

By the-adjustmentof the portions or parts 15 and 16 together or separately, the tool is adapted to articles of various shapes and sizes.

What I claim is:

1. A tool of the class described having forming and cut oflf portions to operate re spectively tangentially and radially of the stock, the forming portion being adapted to conclude its action before the action of the cut off portion is concluded.

2. A tool of the class described having chamfering and out ofl' portions to act respectively tangentially and radially of the stock, the chamfering portion being adapted to conclude its action before the action of the cut off portion is concluded. 3. A tool of the-class described having a sectional circular part the sections ofwhich are respectively provided with forming. and

cut off portions, the forming portion extending a greater distance away from the axis of said circular portion than the cut oil portion.

,4. A tool of the class described having two disks fitted together, each disk having a cutting edge shaped for forming and cutting off operations, the cutting edge of the formin disk being adapted to finish its action be ore the" action of the other portion is concluded,

5. A tool of the class described having two disks fitted together, each disk having a cutting edge shaged respectively for "forming and cutting'o operations, the cutting edge of the forming disk being adapted to finish its action before the action of the other portion is concluded, the two disks being coaxial and rotatively adjustable.

6. A tool' of the class described having forming and cut ofl portions, the forming portion being adapted to conclude its action before the action of the cut off portion is concluded, and the two portions being adapted to act approximately in the same plane at right angles tothe axis of the stock. 7. A tool of the Glass described having forming and cut ofl:' portions, the forming portion being adapted to conclude its action CHRISTOPHER M. SPENCER.

Witnesses:

L. L. MARKEL HEATH YSUTHERLAND.

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